How do you delay a program when you click a button (java swing)

Question

I am creating a program with a jbutton and a jtextfield . I want the textfield to display a message and then make the whole frame disappear after 1 second. I was able to display the message and make the frame disappear using frame.dispose but I can't see the message because the frame disappears instantly. This is what I've tried. I heard using the swing timer also works but I have no idea how to use the swing timer.

//imports

public class GUIFastCash {

    JFrame frame;
    static JTextField window;
    JButton twenty;

    public void go () {
        window = new JTextField();
        twenty = new JButton("$20");
        twenty.addActionListener(new Twenty());

        frame = new JFrame();
        //code adding button and textfield to frame
    }

    class Twenty implements ActionListener {
        public void actionPerformed (ActionEvent event) {
            //code to execute

            try {
                Thread.sleep(1000);
            } catch (InterruptedException ex) {
                Thread.currentThread().interrupt();
            }

            frame.dispose();

        }
    }

}

Answer 1

First is to create a subclass of TimerTask and override the run method. Then, set the Timer to run this after the set amount of time.

class Dispose extends TimerTask {
    @Override
    public void run() {
        frame.dispose;
    }
}

then...

new Timer().schedule(new Dispose(), 1000);

The timer object will dispose the frame after 1000 milliseconds (1s)